OptimizationSingletons (ontop-optimization 4.0.3-owlapi5.17-guava-shaded API)

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`CoreSingletons`	`getCoreSingletons()`
`OptimizerFactory`	`getOptimizerFactory()` TODO: shall we keep it?
`RequiredExtensionalDataNodeExtractor`	`getRequiredExtensionalDataNodeExtractor()`
`OntopOptimizationSettings`	`getSettings()`
`UnionBasedQueryMerger`	`getUnionBasedQueryMerger()`

getOptimizerFactory
```
OptimizerFactory getOptimizerFactory()
```
TODO: shall we keep it?

UnionBasedQueryMerger getUnionBasedQueryMerger()

RequiredExtensionalDataNodeExtractor getRequiredExtensionalDataNodeExtractor()

OntopOptimizationSettings getSettings()

Interface OptimizationSingletons